Champions of Norrath PS2: 24 HoursMy friend and I held a competition (two others where with us making a group of four) to see who could get the farthest in the game, and who could get the best loot.

P.S Lost the competition.. Fun thou!

RuneScape Browser F2P MMO: 24 HoursAnother competition on who could get the furthest (we all made a new accounts), 30+ (forget the exact number) people participated but only 11 of us actually stayed up, myself included.

P.P.S. Lost again.. Still fun thou

I mean of course I've spent 8 hours plus per sitting for Skyrim. and the same for some other games but those two are were the most fun.

I think only about 5-6 hours... but with breaks for quick foods and bathroom and all that. Then again I never bothered to keep track, but I do know it was never suuuper long. The most I ever really do now seems to average at about 2 hours. =T